WMI Filter for laptops

For filtering laptops in a WMI query there are several different approaches to find out if a system is a laptop or not. A suggested way found on the internet is following WMI query

SELECT * FROM Win32_Battery WHERE (BatteryStatus <> 0)

This works, but if you remove the battery from your laptop and keep the lLaptop on the power chord only this will not work. Then the laptop seems to be a desktop machine. A better approach is to use the following WMI-query: